This person is just using hard coded solutions to solve problems. You can check his recent solutions and see.
Is this matrix orthogonal?
Scoring for oriented dominoes
Convert a vector into a number
Replace multiples of 5 with NaN
Find vampire numbers
That's some divisor you've got there...
A matrix of extroverts
Rewrite setdiff to account for non-unique values
Sums of Multiple Pairs of Triangular Numbers
Must be in the front row...
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